NDLI: Improvements to Compressor Prognostics Algorithm for US Navy Ship Service Gas Turbine Generator Sets

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Daniel, E. Caguiat Jeffrey, S. Patterson Scharschan, John Millsaps, Knox
Copyright Year	2005
Abstract	The Naval Surface Warfare Center Gas Turbine Emerging Technologies section conducted land-based testing on a gas turbine generator set in December 2003. The purpose of this testing, which was conducted on a Rolls Royce/Allison 501-K17 gas turbine, was to collect data that could be used to improve a previously developed computer program for predicting optimal compressor wash time intervals. For the purpose of Phase I of this testing, fouling was accomplished by injecting salt into the gas turbine inlet air stream. Phase II of this testing will consist of fouling the middle and back regions of the compressor. Influence coefficients can then be developed for each of these regions indicating how a given region affects overall performance. Typically, in a marine environment, fouling of the front stages occurs due to ingested salt while fouling in middle and rear regions occurs from a combination of ingested salt and oil seal leakage. A number of sensors, including compressor inlet and discharge condition probes, bleed air flow and fuel flow meters, were added in order to monitor engine performance during the testing. In addition, hardware was added to both ingest and monitor the concentration of salt in gas turbine inlet air. For Phase II testing, middle and rear stages of the 14-stage compressor shall be accessed through existing 5th and 10th stage bleed ports. A salt solution will be physically applied to the blades while the compressor is rotated by hand. Results from Phase I indicate that front stage compressor fouling causes a clear increase in inlet static pressure. This is due to the mass flow restriction through the compressor. Additional results are currently being summarized, and data is being utilized to improve the 501-K17 compressor wash prognostics algorithm previously noted.
Sponsorship	International Gas Turbine Institute
Starting Page	557
Ending Page	565
Page Count	9
File Format	PDF
ISBN	0791847284
DOI	10.1115/GT2005-68105
e-ISBN	0791837548
Volume Number	Volume 5: Turbo Expo 2005
Conference Proceedings	ASME Turbo Expo 2005: Power for Land, Sea, and Air
Language	English
Publisher Date	2005-06-06
Publisher Place	Reno, Nevada, USA
Access Restriction	Subscribed
Subject Keyword	Leakage Blades Computer software Compressors Generators Fuels Warfare Flow (dynamics) Pressure Engines Navy Air flow Algorithms Gas turbines Gates (closures) Ships Flowmeters Hardware Sensors Probes Testing
Content Type	Text
Resource Type	Article

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